slide1
Download
Skip this Video
Download Presentation
Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress

Loading in 2 Seconds...

play fullscreen
1 / 10

Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress - PowerPoint PPT Presentation


  • 101 Views
  • Uploaded on

Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress. Native to: Europe, Asia, and North Africa First documented in 1942, confirmed in 45 states Introduced by Aquarium trade Spread mainly by boating activity as well as naturally

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress' - wanda-beard


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Eurasian Watermilfoil

Myriophyllum spicatum

By: Briana Betress

slide2

Native to: Europe, Asia, and North Africa

  • First documented in 1942, confirmed in 45 states
  • Introduced by Aquarium trade
  • Spread mainly by boating activity as well as naturally
  • Habitat: Lakes, Ponds, Shallow Reservoirs, Low flow river and stream areas, brackish waters of protected tidal creeks and bays.
  • Especially abundant in areas of nutrient loading, intense plant management, or boat use.
  • Submersed, rooted, perennial herb
  • Whorled, finely divided leaves with leaflets in pairs of 14
why eurasian watermilfoil is problematic
Why Eurasian Watermilfoil is Problematic
  • Ability to reproduce in fragments
  • High growth rate in a range of temperatures
  • Tolerant of a range of environmental conditions
slide6

Control Methods

  • Mechanical
    • Several cuts may be needed- like mowing your lawn
    • Dredging and rotavation can eliminate all plants
    • Mechanical harvesters are effective but costly
  • Chemical
    • May need to be repeated every 1-4 years
    • 2-4-D , used for dicots
  • Bio
    • Three taxa considered for use on Myriophyllum spicatum
      • Acentria ephemerella
      • Cricotopus myriophylli
      • Euhrychiopsis lecontei
biocontrols
Biocontrols
  • Hydrilla tip mining midge-
  • Cricotopus myriophylli
  • Consumes meristem
  • Problems with mass rearing, and funding has slowed research
  • Milfoil Weevil-
  • Euhrychiopsis lecontei
  • Bores through stem, reducing buoyancy and carbohydrate storage capacity.
  • Pyralid Moth-

Acentria ephemerella

  • Consumes meristem, stem, and leaves.
  • Unsure of host specificity
biocontrol milfoil weevil
Biocontrol- Milfoil Weevil
  • Larvae are stem miners
  • Insectivorous fish may be decreasing weevil populations
  • Euhrychiopsis lecontei
  • 3mm in length
  • Completes all life stages submersed

Egg Larva Pupa Adult

slide9

Any Questions?

library.umf.maine.edu/plagiarism/credit2.html

references
References
  • http://www.forestryimages.org/images/384x256/0002004.jpg
  • http://plants.usda.gov/java/profile?symbol=MYSP2
  • library.umf.maine.edu/plagiarism/credit2.html
  • www.cnipm.org/images/Myriophyllum_spicatum.jpg
  • http://nas.er.usgs.gov/taxgroup/plants/docs/my_spica.html
  • http://www.hear.org/Pier/images/myspi12.jpg
  • http://fwcb.cfans.umn.edu/research/milfoil/milfoilbc/bcresearch.html
  • http://www.rcweeds.org/Weed_List/IMAG045.JPG
ad